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Ronstan Snatch Block, Stainless Steel Sheave, 240mm LOA

Ronstan Snatch Block, Stainless Steel Sheave, 240mm LOA

List: $576.41
Price: $489.95

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    Product Description


    Class leading performance and sleek, contemporary styling
    Excellent dynamic and high static load performance
    Less than half the friction of the nearest competitor
    Removable becket pin for fitting of pre-spliced lines
    ** Line load through cleat not to exceed 175kg (385lb)

    Core Blocks™ are a true all round solution. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.

    Universal Bearing -
    Dynamic and high static load performance
    The Ronstan Universal Bearing incorporates our proven 2-stage bearing system
    Stage 1 - Under moderate loads, Acetal ball bearings ensure minimum friction.
    Stage 2 - Under heavy loads, where deformation of ball bearings alone would result in increased friction, a sliding Acetal bearing on a polished stainless steel race takes over, maintaining low friction performance.
    Additionally the ball bearings are configured to act as a thrust bearing between the sheave and cheeks, preventing the sheave from rubbing on the cheeks and causing friction when the line lead in and out of the block isn’t perfect. Particularly important for cheek blocks.

    Alloy cheek plates Block cheeks are manufactured from the highest quality alloy for maximum strength. Material optimisation and the cut-away design minimises weight and allows easy fresh water rinsing of salt and debris from the bearings. Cheek design has been further styled with flaring at the block throat and reduced gap between the cheek and sheave, minimising rope wear. Applications
    Ideal for mainsheet, halyard and spinnaker sheet applications on boats to 12m (40ft).
    Various control line applications on larger yachts.
    Alloy sheave models are available for use with wire.

    Sheave: U.V. stabilised Acetal or anodised aluminium (AW models)
    Cheek plates: Aluminium alloy
    Ball Bearings: High compression strength carbon black Acetal

    Technical Information

    Imperial Metric
    Sheave Dia. 3 1/8" 80 mm
    Max. Rope Dia. 3/4" 19 mm
    Maximun Working Load 6610 lb 3000 kg
    Breaking Load 13230 lb 6000 kg
    Weight 52.2 oz 1480 g

    Product Description

    Grade 316 stainless steel sheaves running on needle roller bearings deliver low friction performance and a long service life. An extra wide stainless steel frame extends to the full diameter of the sheave to prevent lines from becoming jammed between the sheave and cheeks. Sheaves are removable for easy maintenance and can be used with rope or wire. Trunnion snap shackles are standard for maximum articulation. An attachment point is provided for a shock cord retainer to hang the block from the lifelines.Trunnion snap shackle provides the same swivel action and offers additional articulation from side to side.

    • High strength.
    • Secure latch mechanism.
    • Soft resilient cheeks.
    • Grade 316 Stainless Steel frame, load strap sheave and needle roller bearings.
    • Soft, thermoplastic rubber cheeks.
    • Investment cast Grade 15-5PH Stainless Steel snap shackle.

    Removable spinnaker sheet deflector blocks for boats up to 13 m (43 ft), temporary sheeting point while changing sheets for boats up to 13 m (43 ft), temporary reefing block for boats up to 13 m (43 ft), spare or replacement block for general use on larger boats depending on line angle and load and temporary outboard sheet lead for headsail trimming.

    Part Number: RF6751

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